backdrop_chmod in includes/file.inc

Sets the permissions on a file or directory.

backdrop_realpath in includes/file.inc

Resolves the absolute filepath of a local URI or filepath.

file_create_url in includes/file.inc

Creates a web-accessible URL for a stream to an external or local file.

file_get_mimetype in includes/file.inc

Determines an Internet Media Type or MIME type from a filename.

image_style_url in modules/image/image.module

Return the URL for an image derivative given a style and image path.

StreamWrapperTest::testUriFunctions in modules/simpletest/tests/file.test

Test the URI and target functions.

system_transliteration_retroactive_submit in modules/system/system.admin.inc

Form submit function; retroactively transliterates existing file names.